When habitats are fragmented they harbour fewer and less diverse species. So a study led by major conservation groups used camera traps at seven sites in Uganda, Tanzania, Indonesia, Laos, Suriname, Brazil and Costa Rica to assess mammal populations. The researchers obtained 51,000 images of 105 species. Here are some of the best.

This Panthera onca was photographed on the volcano Volcán Barva in Costa Rica. Jaguars are the biggest cats in the Americas, and the third biggest in the world. Only lions and tigers grow larger.

They are classed as "near threatened" because of habitat loss and poaching, and it's thought their situation is getting worse. There are no jaguars left in the US, after the Arizona Game and Fish Department killed the last one last year.